Improvement in argand gas-burners



UNITED STATES* PATENT OFFICE.

ROBT. MURRAY AND GEO. OAKES, OF BOSTON, MASSAOHUSETTS.

IMPROVEMENT IN ARGAND GAS-BURNERS.

Speeilication forming part of Letters Patent No. 54,193, dated April 24,1866.

To all whom 'it may concern:

Be it known that we, ROBERT MURRAY and GEORGE OAKEs, both of Boston, inthe county of Suffolk and State of Massachusetts, have invented certainnew and useful Improvements in Argand Gas-Burners 5 and we do herebydeclare that the following description, taken in connection with theaccompanying plate of drawings, hereinafter referred to, forms a fulland exact specification of the same, wherein we have set forth thenature and principles of our said improvement by which our invention maybe distinguished from all others of a similar class, together with suchparts as we claim and desire to have secured to us by Letters Patent.

The present invention relates to certain new and useful improvements inArgand gas-burners 5 and it consists in so arranging and constructingthe burner as to produce a more perfeet air-draft, to insure a moreequal distribution of the gas, to obviate the peculiar singing noiseproduced by this kind of burner heretofore in use, to allow of its beingtaken apart so that its different parts may be got at more readily forthe purpose of cleaning them, and to render it, by the simplicity of itsconstruction, economical in cost. These results are attained in ourimproved Argand gas-burner in the following manner:

The burner is made in two castings, through both of which an air-draftis made to pass. Between and around the upper and lower casting acontinuous distribution-chamber is formed, through which the gas hasfree circulation, and from which it is allowed to escape into an upperchamber, formed by the space between the outer and inner Walls of theupper casting, through a series of apertures made in thebottom thereof.It then passes out inthe usual manner through small orifices made in thetop of this chamber. The lower castingis formed in such a `manner thatthe upper portion of its outer rim or periphery comes nearly in contactwith the inner periphery of the upper casting, so that the gas, as itenters from the lower casting into the distribution-chamber formed bythe spaces above and around the two castings, passes from one to theother in the form ot' a iilm or thin sheet, and the singing noise,heretofore caused by the gas passing with full force from one portion ofthe burner to the other, is prevented.

By making the burner in two separate castings its construction isrendered less expensive, audits different parts are made more attainable for the purpose of cleaning them than would be the case if theburner was made as heretofore.

We will now proceed to describe in detail the arrangement and operationof our improved Argand gas-burner, which is represented in theaccompanying plate of drawings, Figure l being a central verticalsection; Fig. 2, a horizontal section taken in the plane of the line AB, and Fig. 3 an elevation of our improved Argand gas-burner.

a a a in the drawings, represent an induction-tube, through which thegas enters and from which it passes through a passage, b b, formed in abar, o c, attached to the top of the induction-tube a a a, and extendingacross the center of the lower casting, d d. The bottom of this lowercasting, cl d, is formed with a lip, e e. Above this lip e e, extendingfrom the top thereof to the bottom of the passage b b, screw-threads arecut, which are made to work in a female screw formed on the inside ofthe lower portion of the upper casting, ff.

The portion of the lower casting, cl 0l, above the screw-threads is madeof a slightly-less diameter than the inner diameter of the uppercasting, ff, so as to leave a very narrow annular space or chamber, g g,between the two castings d d and ff, through which space or chamber g gthe gas passes in a thin sheet or film from the passage b b into adistributionchamber, h h, which is formed by the space between the topof the lower casting, el d, and the bottom i t' of an upper chamber, k7c, which is formed by the space between the outer wall, Z l, and innerwall, m m, of the upper casting, ff. The bottom t i of the upperchamber, lc k, is perforated at intervals with apertures n n, throughwhich the gas passes from the distribution-chamber h h, through which ithas free circulation, into the upper chamber, 7c k, from whence itescapes through the usual series of orices o o, made in the top of thechamber lo 7c.

The lower portion of the outer wall, l l, of

the upper casting, ff, screws down over the upper portion of the lowercasting, d d, and presses firmly upon the seat or bearing formed by thelip e e; and the inner wall, m m, of the upper casting, fj', extendssome distance belowthe bottom 'i t of the chamber 7c 7c, so as to formthe inner side of the chamber 71l h, and

is brought to bear rmly upon a seat or bearv ing formed by the upper rimof the lower casting, el d, so as to prevent any leakage of the gas.

By the above description, reference being made to the drawings, it willbe observed that the chambers h h, g g, and 7c k above and around thelower casting, cl d, being made continuous, the air-draft is moreperfect, and the gas, as it enters from the lower casting, d d, intothese chambers h h, g g, and 7c 7c, has free circulation therein and ismore equally distributed than it otherwise is where the gas is firstintroduced into a distribution-chamber, from which its only delivery isthrough a series of perforated bars, cylinders, and the like meansVhitherto employed in the construction of Argand gasburners.

It will also be observed thatthe upper portion of the lower casting, dd,being formed so asl to come nearly in contact with the inside peripheryofV the lower portion of the upper casting, f f, causes the gas, as itescapes from the lower into the upper casting, to impinge against theinside periphery of the bottom part of the upper casting in vsuch amanner that it passes from one to the other in a thin sheet or film, andthereby regulates the press,- ure of the gas and prevents the singingnoise heretofore produced by the passage of the gas in full force fromone apartment of the burner to the other.

Having thus described our improvements, we shall state our claims asfollows:

What we claim as our invention, and desire to have secured to us byLetters Patent, is-

l. Constructing an Argand gas-burner in two pieces, fastened together soas to form two gas-tight joints and an air-draft through both pieces, asdescribed. p

2. The arrangement of the upper and lower castings in such a manner thatthe outer pe riphery of the upper portion of the latter is brought inclose proximity with the inside of the outer wall of the upper casting,as and for the purpose specified.

3. Constructing and arranging a chamber between the upper and lowercastings, as described, and for the purpose specified.

ROBERT MURRAY. GEORGE oAKEs.-

Witnesses:

JOSEPH GAVETT, SAML.- M. BARTON.

